TriangularMatrix<T>.TryEnsureWritableUnchecked Method

public override bool TryEnsureWritableUnchecked(
	int row,
	int column
)

Public Overrides Function TryEnsureWritableUnchecked ( 
	row As Integer,
	column As Integer
) As Boolean

public:
virtual bool TryEnsureWritableUnchecked(
	int row, 
	int column
) override

abstract TryEnsureWritableUnchecked : 
        row : int * 
        column : int -> bool 
override TryEnsureWritableUnchecked : 
        row : int * 
        column : int -> bool 

Parameters

row  Int32

The zero-based row index.

column  Int32

The zero-based column index.

Return Value

true if the operation succeeded; otherwise false.

The row and column coordinates are assumed valid and are not bounds-checked. Invalid input has unspecified behavior.

public override bool TryEnsureWritableUnchecked(
	int startRow,
	int endRow,
	int startColumn,
	int endColumn
)

Public Overrides Function TryEnsureWritableUnchecked ( 
	startRow As Integer,
	endRow As Integer,
	startColumn As Integer,
	endColumn As Integer
) As Boolean

public:
virtual bool TryEnsureWritableUnchecked(
	int startRow, 
	int endRow, 
	int startColumn, 
	int endColumn
) override

abstract TryEnsureWritableUnchecked : 
        startRow : int * 
        endRow : int * 
        startColumn : int * 
        endColumn : int -> bool 
override TryEnsureWritableUnchecked : 
        startRow : int * 
        endRow : int * 
        startColumn : int * 
        endColumn : int -> bool 

Parameters

startRow  Int32

The zero-based first row, included in the region.

endRow  Int32

The zero-based last row, included in the region.

startColumn  Int32

The zero-based first column, included in the region.

endColumn  Int32

The zero-based last column, included in the region.

Return Value

true if the operation succeeded; otherwise false.

Both endpoints are included and are assumed valid. No bounds, ordering, or range validation is performed; invalid input has unspecified behavior.

A valid empty footprint succeeds for a mutable matrix without preparing or detaching storage. A valid empty footprint on a read-only matrix remains nonwritable.

For base and full-storage matrices, this method establishes value mutability and copy-on-write ownership without inspecting every selected coordinate. Representation overrides may additionally reject intrinsic fixed geometry using a compact structural check.

Successful ownership preparation does not guarantee that every coordinate reached later by a dynamic operation can be written. Dynamic safe unchecked assignment may fail after earlier writes have occurred. Use IsElementWritable(Int32, Int32) to query the exact permission for one logical coordinate.

Reference